Releases by J. Hansen, "enhanced Firmware"

These versions usually come with BricxCC (see ​http://bricxcc.sourceforge.net/ ). They fix bugs from the original firmware and introduce more features for NXC and NBC programs (especially better array support), however there is a small performance penalty compared to LEGO original versions (roughly about 5% slower). They usually don't contain sound files such as the menu-click.